feat: add conditional execution for tasks and commands (#2564)

taskfile/ast/cmd.go

@@ -12,6 +12,7 @@ type Cmd struct {
 	Cmd         string
 	Task        string
 	For         *For
+	If          string
 	Silent      bool
 	Set         []string
 	Shopt       []string
@@ -29,6 +30,7 @@ func (c *Cmd) DeepCopy() *Cmd {
 		Cmd:         c.Cmd,
 		Task:        c.Task,
 		For:         c.For.DeepCopy(),
+		If:          c.If,
 		Silent:      c.Silent,
 		Set:         deepcopy.Slice(c.Set),
 		Shopt:       deepcopy.Slice(c.Shopt),
@@ -55,6 +57,7 @@ func (c *Cmd) UnmarshalYAML(node *yaml.Node) error {
 			Cmd         string
 			Task        string
 			For         *For
+			If          string
 			Silent      bool
 			Set         []string
 			Shopt       []string
@@ -92,6 +95,7 @@ func (c *Cmd) UnmarshalYAML(node *yaml.Node) error {
 			c.Task = cmdStruct.Task
 			c.Vars = cmdStruct.Vars
 			c.For = cmdStruct.For
+			c.If = cmdStruct.If
 			c.Silent = cmdStruct.Silent
 			c.IgnoreError = cmdStruct.IgnoreError
 			return nil
@@ -101,6 +105,7 @@ func (c *Cmd) UnmarshalYAML(node *yaml.Node) error {
 		if cmdStruct.Cmd != "" {
 			c.Cmd = cmdStruct.Cmd
 			c.For = cmdStruct.For
+			c.If = cmdStruct.If
 			c.Silent = cmdStruct.Silent
 			c.Set = cmdStruct.Set
 			c.Shopt = cmdStruct.Shopt

taskfile/ast/task.go

@@ -40,6 +40,7 @@ type Task struct {
 	IgnoreError   bool
 	Run           string
 	Platforms     []*Platform
+	If            string
 	Watch         bool
 	Location      *Location
 	Failfast      bool
@@ -145,6 +146,7 @@ func (t *Task) UnmarshalYAML(node *yaml.Node) error {
 			IgnoreError   bool `yaml:"ignore_error"`
 			Run           string
 			Platforms     []*Platform
+			If            string
 			Requires      *Requires
 			Watch         bool
 			Failfast      bool
@@ -184,6 +186,7 @@ func (t *Task) UnmarshalYAML(node *yaml.Node) error {
 		t.IgnoreError = task.IgnoreError
 		t.Run = task.Run
 		t.Platforms = task.Platforms
+		t.If = task.If
 		t.Requires = task.Requires
 		t.Watch = task.Watch
 		t.Failfast = task.Failfast
@@ -228,6 +231,7 @@ func (t *Task) DeepCopy() *Task {
 		IncludeVars:          t.IncludeVars.DeepCopy(),
 		IncludedTaskfileVars: t.IncludedTaskfileVars.DeepCopy(),
 		Platforms:            deepcopy.Slice(t.Platforms),
+		If:                   t.If,
 		Location:             t.Location.DeepCopy(),
 		Requires:             t.Requires.DeepCopy(),
 		Namespace:            t.Namespace,